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		log<sub>10</sub>n                <br />
		5<sup>n</sup>                    <br />
		删除：<del>来了啊</del>         <br />
		变粗：<b>来了啊</b>                     <br />
		变大：<big>来了啊</big>                 <br />
		斜体：<i>来了啊</i>                     <br />
		嵌套用：<b><big><i>来了啊</i></big></b>  <br />
		font调样式：<br/><font color="aqua" size="10">来了啊</font> <br />
		css层叠样式：<p style="font-size: 70px;font-family:'楷体';color:blueviolet;text-decoration: underline;">鸡汤来咯</p>
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